A reliable correlation of SPT-CPT data for southwest of Sweden

Abstract

The requirement for reliable SPT-CPT correlation can be useful for application of CPT data in the existence of SPT design correlations and when only SPT data were available, for someone who is more familiar with CPT, it is possible to convert the SPT data to CPT cone resistance. Hence, our emphasis in this study is to determine a reliable correlation of CPT-SPT by a detail comparison with other researchers in various mathematical relations for Lilla Edet area in southwest of Sweden. To get the aim, by "Abbas Converter 3.01" a generated C# GUI computer code which is developed for CPT data processing, a high accuracy data processing and interpretation were implemented and the soil types were determined. After reviewing of the published CPT SPT correlations we eliminate some of them because of not taking into account the statistical procedures. In next step of this study by use of arithmetic average method, Student t-test and statistical analysis for field and normalized data set and then using a filtering procedure for elimination of far from trend data and application of several mathematical curve fitting tools, the correlation for three condition (linear with zero intercept, linear, power) were obtained and compared to each other. Comparison of obtained results by previous works showed good agreement and moreover, the results showed that filtered data have higher correlation coefficient but because of the applied accuracy in data processing this differences is no significant.